The 24 year old has suffered numerous injuries during his time at Old Trafford and that has slowly turned him into an unreliable player.
BBC Sport pundit Waddle didn't hold back in his assessment of Manchester United's performance.
The France worldwide this week finished a period of rehabilitation in Miami, where he was filmed playing basketball with NBA player Jimmy Butler.
Fred has stepped up well in the absence of Paul Pogba and while Solskjaer appreciated the same, he also shed light on Pogba's fitness and potential return to action. And the result will inevitably lead to further speculation about the future of Ole Gunnar Solskjaer, among the United fanbase - and indeed at boardroom level.
'And, as I said before, it'll be like signing a new player before the transfer window opens.
"We didn't go out together [against Villa] as a team".
'Of course that's gonna be a new signing for us, he's not really been able to play for us so when we get him back it'll be like a new world-class signing, a new world-class midfielder. Let's see where he's at when he comes back and he starts training with us.
"It was a real, spirited performance today against a team that's got four really bright players up front with a lot of pace who are hard to contain but we did well".
"Now we're 13 games into the Premier League season and the club is looking to push forward, I know it is".
And in Jack Grealish, who scored a brilliant opener, could have added a second and would not have looked out of place in red, they had the best player on show.
"He just keeps putting more pressure on those who have to select them squads".
Their last five games have been bookended by victories and Smith will be hoping last Monday's victory over Newcastle will give his team confidence for the trip up the M6.
The last time these two sides met at Old Trafford in 2016, the hosts got the win, thanks to a goal from Marcus Rashford.
How to Watch the Free Live Streaming Online and Football Score Updates of Manchester United vs Aston Villa, Premier League 2019/20 Season Football Match?